linux-kernel - Re: [PATCH net-next] net: x25_asy: Delete the x25

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Message-ID: <CAJht_EPP_otbU226Ub5mC_OZPXO4h0O2-URkpsrMBFovcdDHWQ@mail.gmail.com>
Date:   Thu, 5 Nov 2020 12:04:55 -0800
From:   Xie He <xie.he.0141@...il.com>
To:     Arnd Bergmann <arnd@...nel.org>
Cc:     Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        Networking <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>, Martin Schiller <ms@....tdt.de>,
        Andrew Hendry <andrew.hendry@...il.com>,
        Linux X25 <linux-x25@...r.kernel.org>
Subject: Re: [PATCH net-next] net: x25_asy: Delete the x25_asy driver

On Thu, Nov 5, 2020 at 7:07 AM Arnd Bergmann <arnd@...nel.org> wrote:
>
> Adding Martin Schiller and Andrew Hendry, plus the linux-x25 mailing
> list to Cc.

The linux-x25 mail list has stopped working for a long time.

> When I last looked at the wan drivers, I think I concluded
> that this should still be kept around, but I do not remember why.

I think we only decided that X.25 as a whole was still needed. We
didn't decide that this particular driver was necessary.

> Since you did the bugfix mentioned above, do you have an idea
> when it could have last worked? I see it was originally merged in
> linux-2.3.21, and Stephen Hemminger did a cleanup for
> linux-2.6.0-rc3 that he apparently tested but also said "Not sure
> if anyone ever uses this.".

I think this driver never worked. Looking at the original code in
Linux 2.1.31, it already has the problems I fixed in commit
8fdcabeac398.

I guess when people (or bots) say they "tested", they have not
necessarily used this driver to actually try transporting data. They
may just have tested open/close, etc. to confirm that the particular
problem/issue they saw had been fixed.